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It is 292 km long.
Yser , Yonne , Yevre ,Yon ,
The Yonne is a river in France. The Yser is a river that rises in the north of France and flows into Belgium.
The Yukon River is a major river in North America. The Yonne is a river in France. The Yarra River is in Victoria, Australia.
The rivers Yonne, Marne, and Oise are the main rivers joining the Seine river along its course.